تلفظ بین المللی : /θˈɜːmətˌɛnʃən/ تلفظ : [T'3:m@t,EnS@n]
English
(a) A simple visual organ found in many invertebrates, consisting of pigment cells covering a sensory nerve termination. (b) An eyelike spot of color.
A process of increasing the strength of wrought iron
by heating it to a determinate temperature, and giving to it, while in
that state, a mechanical strain or tension in the direction in which
the strength is afterward to be exerted....
